85 



specimens of fossils, and had been shown by him a mag- 

 nificent surface of rock, half the size of the library-room 

 of the Society, completely covered with impressions. This 

 rock, however, was in situ, and it was considered impossible 

 to remove the surface in a single piece. Mr. Field has suc- 

 ceeded the late Mr. Marsh in this work, and is much inte- 

 rested in the discovery of fossil impressions. He is disposed 

 to perfect himself in science, and will soon be enabled to 

 turn to good account the discoveries he may make. 



Mr. White presented specimens of erratic rocks bearing 

 fossils, from Mt. Katahdin, Me. 



Dr. C. T. Jackson remarked that they were of Silurian 

 origin. The south shore of Lake Superior is covered with 

 erratic rocks containing fossils, and this had led to error in 

 studying the geology of Lake Superior. 



Prof. Wyman said he had seen on the coast of Labrador, 

 considerably above the sea, fossils in erratic rocks of Silu- 

 rian origin. 



Dr. Durkee called attention to a number of valuable 

 works, recently purchased for the Society from the estate 

 of the late Dr. W. L Burnett. 



Dr. Storer presented the third number of his work on the 

 Fishes of Massachusetts. 



Dr. Storer had received, since the last meeting, a large 

 shark, (Carcharias Atwoodi,) seven feet in length, from 

 Capt. Atwood of Provincetown. It has been figured and 

 described. 



Mr. S. D. Shaw, of East Bridgewater, was elected a 

 Resident Member. 



